I suppose someone has to ask....
Are you having one of these?
I suppose a Delorean allows you to have some odd ball electrical bits inside and it would be cool gliding along with only EV noises.
A Soliton1 controller would look good in that spot all lit up.
As to the wiring, Are there any components that you have to keep to keep the car functional? If not then I would be tempted to start from scratch and make or buy a simple loom. Most of the dash will probably be reworked to display your pack and controller information anyway.